body,html{
  line-height: 1;
  font-weight: 200;
  font-family: 'PingFang SC','STHeitiSC-Light','Microsoft JhengHei UI','Helvetica',Arial,sans-serif;
}

.clearfix{
  display: inline-block;
  zoom: 0;
  &:after{
    display: block;
    content: '.';
    height: 0;
    line-height: 0;
    clear: both;
    visibility: hidden;
  }
}

@media (-webkit-device-pixel-ratio: 1.5), (min-device-pixel-ratio: 1.5) {
  .border-1px{
    &:after{
      -webkit-transform: scaleY(.7);
      transform: scaleY(.7);
    }
  }
}
@media (-webkit-device-pixel-ratio: 2), (min-device-pixel-ratio: 2) {
  .border-1px{
    &:after{
      -webkit-transform: scaleY(.5);
      transform: scaleY(.5);
    }
  }
}
